Callins capacitor?

Nothing. They aren't even new, they are surplus. As PT Barnum's competitor said, "There's a sucker born every minute."

Just buy new 105F Nichicons from a reliable vendor.

--
"I am a river to my people." 
Jeff-1.0 
WA6FWi 
http:foxsmercantile.com

Is that a non-polar electrolytic? Looks like two regular caps potted.

What use is a 300 uF non-polar 'lytic?

--

John Larkin      Highland Technology, Inc 

The best designs are necessarily accidental.

It relieves audiophools of their surplus cash?

Motor Start Capacitor:

NTE Electronics MSC125V270 Series MSC Motor Start AC Electrolytic

110/125V

CDN$ 15.92 FREE Delivery

--
The best designs occur in the theta state.  
- sw

It's for restoration, rather than repair.

RL

Crossover network?

I also saw something of a similar value in a Hafler preamp parts list, (and another smaller value) though I couldn't locate it on the schematis..

RL

But the Callins is 25 volts.

So? You didn't specify. You said "What use is a 300 uF non-polar 'lytic?"

I imagine the Amazon cap could be used in audio applications. It may even have lower distortion. It is certainly intended to carry amps of current, and might even be used in high power aplications where the original collins would fail. The Amazon is brand new, where the collins has probably dried out by now.

--
The best designs occur in the theta state. - sw

The earlier Callins link was only for reference to give people an idea of the price and physical characteristics.

My questions actually pertain to a 100 ?F 6 V Callins, which looks identical. It's used in a PAIA VCO module from the 1970s. The schematic's shown here:

C7 is the Callins. C6 is a plain vanilla electrolytic in a can. They both have a value of 100 ?F.

Although the simpleminded answer goes through everyone's mind first, it doesn't add up. Why pay more for a Callins back in the day? Why not buy twice as many electrolytics in cans to get a better price break? Or, if Callins was the cheap alternative back then, why pay more for electrolytics in cans?

Perhaps the answer's as simple as the late John Simonton inheriting a pile of Callins. It's too late to ask John, but there's a PAIA forum, which may supply some answers, provided they process my registration. For the time being, the Callins will be substituted with a new electrolytic in a can.

Danke,

--
Don, KB7RPU 
There was a young lady named Bright Whose speed was far faster than light; 
She set out one day In a relative way And returned on the previous night.

** You have noticed the Callins is in an epoxy sealed container? Regular electros are in a rubber bung sealed can.

Which would you think is better for keeping the juice in ?

...... Phil

Vishay probably still makes the epoxy sealed capacitors. I believe the goal is to keep stuff (halogens or solvents?) out of the capacitor vs. increasing life.

Interesting, but it doesn't answer my question:

Why was the circuit designed to use a Callins in C7?

Danke,

--
Don, KB7RPU 
There was a young lady named Bright Whose speed was far faster than light; 
She set out one day In a relative way And returned on the previous night.

---------------------------------------

** Bullshit.

.... Phil

-------------------------------

** You did not answer mine - f*****ad. Why ?

..... Phil

So they could call themselves Rich Electronics.

The second picture (un)clearly shows + + + marking.

Don,

If you look closely at the photo showing the cap on its side, you'll see a row of "+" marks, so this is a plain old polarized electrolytic capacitor, are are both C6 and C7 on the schematic diagram you provided. Perhaps one of them had been replaced over the units history. One is marked 100uf/10V and the other 100V/6V, so maybe it is what the purchasing department was able to get a deal on.

My experience with those encapsulated Callins caps is that they are awful. I am NOT a fan of changing every electrolytic capacitor over 3 months old, which seems to be popular on internet forums, but I might make an exception for the Callins caps. A couple of years ago I got a lot of surplus caps, including dozens of Callins, all of which tested bad even after being give a while to form up on my trusty Heathkit IT-28 "capacitor checker".

AR and KLH seemed to use quite a few of them in some models.

Maybe they are charging so much because they are the only good ones left on the planet?

Regards, Tim Schwartz Bristol Electronics

Same thing.

RL

Looks like a 6V part used to filter a 6.2V reference voltage.

Hmmm.

RL